What’s Vulnerable › Vulnerabilities

CVE-2023-32255: Kernel: memory leak via ksmbd session setup request with unknown ntlmssp message type

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-08-02 · updated 2026-06-30
• Weakness: CWE-772

Description

A flaw was found in the Linux kernel's ksmbd component. A memory leak can occur if a client sends a session setup request with an unknown NTLMSSP message type, potentially leading to resource exhaustion.

References

• https://access.redhat.com/security/cve/CVE-2023-32255
• https://bugzilla.redhat.com/show_bug.cgi?id=2385884
• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6d7cb549c2ca20e1f07593f15e936fd54b763028
• https://www.zerodayinitiative.com/advisories/ZDI-23-703/

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